Adsorption of Tl(I) on Na–montmorillonite and kaolinite from aqueous solutions

Deng, Hongmei; Chen, Yongheng; Wu, Honghai; Liu, Tao; Wang, Yaolong; Wu, Gaoyuan; Ye, Hengpeng

doi:10.1007/s12665-016-5570-0

Cited by 19 publications

(1 citation statement)

References 40 publications

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“…In comparation with other methods, adsorption has recently gained more and more attentions, due to the advantages of high efficiency, affordable cost, simple operation and little toxic sludge generation 3 , 6 . Numerous adsorbents such as carbon materials 15 , 16 , mineral materials 17 , 18 , biomass materials 19 , Prussian blue and analogues 20 – 22 , manganese oxides 23 – 27 and titanium-based materials 28 – 30 , have been employed to remove Tl(I) from water or wastewater.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient removal of thallium(I) by facilely fabricated amorphous titanium dioxide from water and wastewater

Zhang

Luo

Han-lin

et al. 2022

Sci Rep

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In this study, amorphous hydrous titanium dioxide was synthesized by a facile precipitation method at room temperature, aiming to effectively remove thallium(I) from water. The titanium dioxide prepared using ammonia as precipitant (TiO2I) is more effective for thallium(I) uptake than the one synthesized with sodium hydroxide (TiO2II). The TiO2 obtained particles are amorphous, aggregates of many nanoparticles and irregular in shape. The thallium(I) uptake increases with the rise of solution pH value. Under neutral pH conditions, the maximal thallium(I) adsorption capacities of TiO2I and TiO2II are 302.6 and 230.3 mg/g, respectively, outperforming most of the reported adsorbents. The amorphous TiO2 has high selectivity towards thallium(I) in the presence of multiple cations such as K+, Ca2+, Mg2+, Zn2+ and Ni2+. Moreover, the TiO2I is efficient in removing thallium(I) from real river water and mining wastewater. Additionally, the spent TiO2I can be regenerated using hydrochloric acid solution and reused. The Tl(I) adsorption is achieved via replacing the H+ in hydroxyl group on the surface of TiO2 and forming inner-sphere surface complexes. Owing to its high efficiency, facile synthesis and environmental friendliness, the TiO2I has the potential to be used as an alternative adsorbent to remove Tl(I) from water.

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